[Typings] Initializers are not allowed in ambient contexts (priority variable)

Created by: mcereijo

I am building an Angular 8 application with the version 3.0.1 of the dash.js library.

When use the npm start command, it throws the following error:

Console output

ERROR in node_modules/dashjs/build/typings/index.d.ts:868:29 - error TS1039: Initializers are not allowed in ambient contexts.

868         priority?: number = -1;

The version 3.0.0 doesn't have this error.